Means for producing röntgen rays.



A. WASMUS.

MEAN 8 FOR PRODUGING R5NTGEN' RAYS. Arm-lumen FILED MAR. 18, 1912.

Patented July 22, 1913.

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lowing is a specification.

UNITED STATES PATENT OFFICE.

ADOLF WASMUS, OF HAMBUBG,-GERMANY, ASSIGNON TO GESELLSCHAFT FOR DRAH'I- LOSE TELEGRAPHIE, M. B. H., OF BERLIN, GERMANY, A. CORPORATION OF GER MANY.

. To all whom, it may concern:

Be it known that I, ADoLF lVAsuiTs, a subject of the German Emperor, residing at Hamburg, Germany, have invented certain new and useful Improvements in Means for Producing Riintgen Rays, of which the fol- My invention relates to means for producing Rontgen rays by means of high tension currents of high frequency supplied to the cathode only of the Riintgen tube, and has for its object to-pro-vide means whereby a highly unsymmetrical form may be imparted to said currents for the purpose of overcoming certain inherent defects in the production of Riintgen rays by the application of high tension alternating currents of high frequency.

Heretofore, attempts have frequently been made to operate Rtintgen tubes with alternating currents of high frequency, the cathode of the tube being connected to the single ole of a-Tesla transformer. The results o tained have been unsatisfactory for the reason that both half-waves of the alternating current are symmetrical the valve like action of the Riintgen tubesbeing uni-iodicity, may be employed witha transformer, the secondary circuit of which is completed through a spark gap which spark gap also completes an oscillatory circuit consisting of the primary circuit of a high frequency transformer. Alternating currents from the secondary winding of the J high frequency transformer, have been connected up with the cathode of a Rtintgen tube according to the disclosure ofmy copending application Serial No. 684,651. The present invention contemplates imparting a maximum degree ofunsymmetrical form to the curve representing the current supplied to the cathode of the Rtintgen tube. For this purpose a quench tube is placed in series with one of the windings of the high frequency transformer. Preferably I use Wiens quench tube, in the oscillatory cir-' cuitin the manner exemplified on the ac- MEANS FOR PRODUCING RONTGEN RAYS.

companying drawings which shows a dia gram of the connections for producing Rontgen rays by high tension currents of high frequency and unsymmetrical form supplied to the cathode only of the tube,

In the drawings, Figure 1 is a'wiring diagram showing a Wien tube included in the primary oscillation circuit; Fig. 2 is a fragmentary wiring diagram showing a Wien tube included in the secondary oscillation circuit.

Referring to Fig. 1 of the drawing, the current obtained from an alternating current system a traverses the primary winding of a transformer t. The latter increases the tension, of the current to several thousand volts and is connected by its. secondary winding with the spark gap g. Connected in parallel to? the spark gap 9 is the primary winding of. a high frequency transformer h, a condenser c and a quench tube, such for example as Wiens quench tube w being added in series to the circuit. One end of the secondary high tension coil of the Tesla transformer h is connected to the ground e and the other one to the cathode of the Rontg'en tube 1'. g

. According'to the above described arrangement, the secondary side of the transformer constitutes in effect a radiating coil: of

.which the ends are not closed over a capacity, the action being similar to that of an open transformerfinthe secondary coilsof which oscillations are produced of the same frequency and damping as in the primary circuit, but at correspondingl higher voltage. Owing to the great reslstance of the, secondary coil and to the consumption of energy in the Rtintgen tube, the damping in the secondary circuit is materially higher than in the primary circuit.

,The quench tube designated by w on the drawings is constructed substantially similar to that used by Max Wien as described in Pkg silvalz'sche Zez'tsc/m'ft vol. 11, 1910, 9 pages 7 6 and .937. This tube is air-tight and 1 preferably provided with electrodes in opposite ends thereof, said electrodes being ondary' win Y course insuiiicijent" to" i urrect'ion in Letters Patent No. l,(,) 6 7,851.

cuit includingntihe condensers and the secg 1 of the transformer t. the quench tube is of revent the char ing resistance as it as,

The resistance oi of condenser ci but she in addition tothe resistance of spark gap- 9 requires a certain minimum potential in the condenser c to produce the necessary disruptive 'dischargeacross the spark gap, 9, -but immediately the fall in potential occasions .a .rapid quenching effect in the primary oscillation circuit. The momentary impulse thus deliveredto the secondary oscillation circuit will be rapidly diifused by the Riintgen tube for thqhreason that said Rbntgen tube does not ave the re quired capacity to sustain a prolonged vibrationin the secondary oscillation circuit.

As a consequence, not only is a considerable portien'of the energy radiated during the.

rise and; fall of each positive wave which readily traverses the Riintgen tube, but the succeeding negative wave resulting from the reduced pressure, by the valve action of the tube. As a result, the desirable waves will. largely preponderate over the undesirable waves and the undesirable eflects referred to in the foregoing part of this specification are reduced to a minimum. n the embodiment shown in Fig. 2, Wiens tube is connected.

up in the secondary circuit its efi'ect being to offer but small resistance to the positive waves which are permitted to traverse the Rent-gen tube freel When however its resistance is oppose to the negative wave, such negatlve-wave has been already -considerabl damped by the valve-like action ofthe tiintgen tubeso that relatively,-the

ment. in

= Germany,

Letters Patent should be read with [snub] .is still further chokedfrequency upon the application of Adolf Wasmus,

schaft fur Drahtlose Telegraphic, m, b. H.,-

whereas said Letters Patent should have been issued to Simms 'cf:

resistance of Wiens tube is much greater upon the negative than upon the positive waves and t e dampening efiects are thus materially increased.

, What I claim is:- I I 1. The combination with a Rontgeh tube,

of a high frequency transformer, the cathode only of said tube being connected to the secondary winding of said transformer, a primary oscillation circuit including the primary winding of sai'd'transformer and a spark gap, :1 quench tube connected in'series with one of the windings of said transformer, and means for supplyin alternating curnent to the primary osci ating circuit, the construction and arrangement of the elements of the above combination being adapted to impartan unsymmetrical form to the alternating current traversing the Riintgen tube.

2. The combination with a Riintgen tube, of a hi h frequency transformenthe cathode onl 0 said; tube being'connected to the secon ary'windinof, said transformer, a high osci lation circuit to .which the primar winding of said transformer is connected, said oscillation circuit being provided with a' spark'gap, means'for supplying alternating current to the primaryosclllatmg circuit, and a quench tube arranged in two witnesses. I p

' ADOLF \VASMUS. Witnesses:

WERNER RUSOHEWEYLE, ERNEST H. L. MUMMnNfIorF.

It is hereby certified that Letters Patent No. 1,067,851 granted July 2), 1913,

of Hamburg, Germany, for an improve- Means for, Producing Rontgen Rays,-."- was erroneously issued Geselb of Berlin, Germany, a corporation of :Halgke, A. G., of- Berlin, Germany, a corporation of Germany, and that the said I this, correction therein that the same may conform to the record of they case in the Patent Ofice. I v

Signed and gjned an: 19th day of August, A. 1)., 191a.

THOMAS-EWING,

Q Goon/mission of Patents.

-' ondary' win Y course insuiiicijent" to" i urrect'ion in Letters Patent No. l,(,) 6 7,851.

cuit includingntihe condensers and the secg 1 of the transformer t. the quench tube is of revent the char ing resistance as it as,

The resistance oi of condenser ci but she in addition tothe resistance of spark gap- 9 requires a certain minimum potential in the condenser c to produce the necessary disruptive 'dischargeacross the spark gap, 9, -but immediately the fall in potential occasions .a .rapid quenching effect in the primary oscillation circuit. The momentary impulse thus deliveredto the secondary oscillation circuit will be rapidly diifused by the Riintgen tube for thqhreason that said Rbntgen tube does not ave the re quired capacity to sustain a prolonged vibrationin the secondary oscillation circuit.

As a consequence, not only is a considerable portien'of the energy radiated during the.

rise and; fall of each positive wave which readily traverses the Riintgen tube, but the succeeding negative wave resulting from the reduced pressure, by the valve action of the tube. As a result, the desirable waves will. largely preponderate over the undesirable waves and the undesirable eflects referred to in the foregoing part of this specification are reduced to a minimum. n the embodiment shown in Fig. 2, Wiens tube is connected.

up in the secondary circuit its efi'ect being to offer but small resistance to the positive waves which are permitted to traverse the Rent-gen tube freel When however its resistance is oppose to the negative wave, such negatlve-wave has been already -considerabl damped by the valve-like action ofthe tiintgen tubeso that relatively,-the

ment. in

= Germany,

Letters Patent should be read with [snub] .is still further chokedfrequency upon the application of Adolf Wasmus,

schaft fur Drahtlose Telegraphic, m, b. H.,-

whereas said Letters Patent should have been issued to Simms 'cf:

resistance of Wiens tube is much greater upon the negative than upon the positive waves and t e dampening efiects are thus materially increased.

, What I claim is:- I I 1. The combination with a Rontgeh tube,

of a high frequency transformer, the cathode only of said tube being connected to the secondary winding of said transformer, a primary oscillation circuit including the primary winding of sai'd'transformer and a spark gap, :1 quench tube connected in'series with one of the windings of said transformer, and means for supplyin alternating curnent to the primary osci ating circuit, the construction and arrangement of the elements of the above combination being adapted to impartan unsymmetrical form to the alternating current traversing the Riintgen tube.

2. The combination with a Riintgen tube, of a hi h frequency transformenthe cathode onl 0 said; tube being'connected to the secon ary'windinof, said transformer, a high osci lation circuit to .which the primar winding of said transformer is connected, said oscillation circuit being provided with a' spark'gap, means'for supplying alternating current to the primaryosclllatmg circuit, and a quench tube arranged in two witnesses. I p

' ADOLF \VASMUS. Witnesses:

WERNER RUSOHEWEYLE, ERNEST H. L. MUMMnNfIorF.

It is hereby certified that Letters Patent No. 1,067,851 granted July 2), 1913,

of Hamburg, Germany, for an improve- Means for, Producing Rontgen Rays,-."- was erroneously issued Geselb of Berlin, Germany, a corporation of :Halgke, A. G., of- Berlin, Germany, a corporation of Germany, and that the said I this, correction therein that the same may conform to the record of they case in the Patent Ofice. I v

Signed and gjned an: 19th day of August, A. 1)., 191a.

THOMAS-EWING,

Q Goon/mission of Patents. 

